Concentrator.



W. A. BUTGHART.

CONGENTBATR.

APPLIOATION FILED un 14, 1912.

1,052,036. I Patented Feb. 4, 1913.

WILLAM A. BUTCHART, F LOS ANGELES, CALIFORNIA.

CONCENTRATOR.

Specification of Letters Patent.

Application inea may 14,1912. serial No. 697,317.

To all whom t may concern Be it lmown that I, WILLIAM A. BU'roH- ART, a lcitizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California., have invented a new and useful Concentrator, of which the following is a specification.

This invention relates toimprovements on the concentrator table disclosed in my Patents Nos. .997,235issued July 4th, 1911, and 1,000,579 issued August th, 1911, and the main' object of the present invention is to improve the method of placing the riflies upon the surface of a concentrator table as 15 set forth in said applications, so that such table may be enabled to treat a greater daily tonnage of material, especially ores carrying high mineral values, under the varyin conditions of treatment as found in di erent localities. l

ln order that the loss of values may be reduced to a minimum in concentrating differ-v ent classes and grades of ore carrying values in one metal, as well as complexA ores whose values are in two or more metals,.and to provide means for their more economical and advantageous extraction, I have in some cases found 1t desirable to vary the systems of rifliing disclosed in the patents mentioned, and also to modify said systems in such mannerthat they maybe accommodated to table surfaces of other forms than those shown in my patents.

Other objects of the invention will appear 85 hereinafter.

The accompanying drawings illustrate embodiments of the invention, and referring' thereto: Figure'l is a plan of one yform of 'the table. Fig. 2 is an end elevation thereof. 40 Fig. 3 is a plan of one of the riflles shown in Fig. 1. Fig. 4 is a contour of said riflie. Fig. 5 is a side elevation of said rilile. Figs. 6 and 7 are end elevations of the riftie shown in Fig. 5. Fig. 8 is a plan of another form .45 of table embodying my invention.. Fig. 9 is.

a plan, Fig. -10 is a contour, and Fig. 11 is a side elevation of one of the riiles shown in.

Fig. 7.

1 designates a concentrator table surface provided with riflles 2, extending longitudinally thereon, with a feed box 3 toward the rear end and at the side which, in the operation of the machine, is the higher side thereof, and with a 'water box 4 fgr supplying dressin water. Suitable means are provided or supportingv the table, imparting motion thereto, and .giving it longitudinal and transverse inclinations, but are not shown as they form no part of this application. Each of the riiiies of my system comprises a rear portion 5 extending from the rear or feed end of the table toward the front or concentrates discharge extremity thereof, approximately parallel to the line ofreciprocation indicated atmin Figs. l, 3 and 4C, these rear riflie portions 5 terminating along a line a-a, extending diagonally toward the lower side and front end of t-he table, so that'the termination of each rillle portion 5 is somewhat in advance of the preceding riiiie portion 5f Each riflie further comprises a portion 6 extending forwardly from the end of the riliie portion 5 and Vdeflected with reference to said riie portion 5' toward the upper side of the table. These riiiie portions 6 may terminate along a secratentea ree. a, 1ers.

ond line b-b, extending diagonally toward the lower side and front end of the table. The riiiies `ma`y further comprise delivery portions 7 extending from the upwardly de lected portions 6 aforesaid, forwardly along the table, being, for example, deflected with reference to said riiiie portions 6, toward the lower side of the table. The rear part of the table occupied by the rilfle portion 5 constitutes a stratifying zone, the part occupied by the riliie portions 6 constitutes a cleaning zone, and the part occupied by riffle portion 7 constitutes a delivery zone, the space between any two successive riffles 2 therefore ffzonstituting a complete concentrating surace. v

In order to secure maximum capacity it is.

which the stratiicatlon is eifected,viz., the

portions 5. I have found that the best results are obtained by extending the taper or.

gradual decrease in Vheight of the rear portions 5 ofthe riflle portions 6 in the cleaning zone, for" example, by providing a gradual. decrease 1n height of the riies to a pointwhich is in advance of the beginning of the i deflected portions 6, so that more or less of said Adeflected portions Gare alsotapered.

T hus, as indicated in Fig. 1, the taper` of the A riiiles may terminate along a diagonal line c, c, extending obliquely from the forward end of the uppermost riflle ortions 6 to the rear end of the lowerrncstriEle portions 65o that the taper extends toagreater distance` along theupper riiiie portions 6 thannit does along the lower riiile portions d and in the intermediate riiiie portions @the taper will end at a point such as indicated at d in Ejig. 5, intermediate the ends of the ritiie portions 6.

The advantage of having the taper of the n riiile extending beyond the beginning ot the deflected portions 6 is that the separation is thereby rendered cleaner and-the capacity is increased, as the machine may be loaded to a m, greater extent without danger ci piling or crowding of the'heavy materiai over the rie portions 6 in the cleaning zone where it rst strikes the obstruction due to the llipward deflection of said riiile.

rihe operation is as follows: The table .being reciprocated inthe usual or any suitable manner, for example, by diterential head motion, and the material being fed thereonto from the feed box 3 and water being 2g, supplied from the water box e, the material is supplied over the stratiiying zone, ac cumulating in the spaces between therifiies and being caused to advance along the table by the diterential motion, at the same time 2g, the water passing transversely over the table, causes progress of the material, particularly of the lighter constituents, from lthe higher toward ,the lower side of lthe table, and b reason of the shaking action,

3g the materia s settle in strat-a according to their density. .As the stratiiied material is forced forwardly by the differential motion, it enters the cleaning zone between the diagonal lines a-a and ZJ-b, and is deflected upwardly by the riiiie portions 6 and is subjected in such zone to the' cleaning action of the water which is passing downwardly between'the riiiie ortions 6 in 'a direction opposite to that otp the solid material. `By reason of the taper of the initial portions of these cleaning ritle portions, the material is subjected to a gradual wash or overilow of the li hter material over these taper por-j tions an 'a more uniform cleaning actionf l a5 secured. 0n reaching the upper ends of the defiected rime portions, the material Venters lthe spaces between the riiie portions 7 in the delivery zone` and passes longitudinally' in said spaces to the discharge or 'front end 5a of the machine.

The invention may be applied as shown in Fig 8, in connection with a table in which there is no delivery zone, the material being delivered directly from the cleaning zone to the discharge extremity of the table. In

this figure 10 represents the table surface, 12 the riiles thereon, 13 the feed box and v14 l; water boX the table being inclined so l ii the'ieed and wash water boxes are o0 at tli'higher end. In' this case the riiles 12 may be provided with rear portions 15 eX- tending parallel or approximately parallel to the axis of reciprocation of the table indicated at /-w in Fig. 8, and cleaning rime portions 16 extending fromthe ends otsaid nosa-cee rearlritlie portions and deflected upwardiy toward the higher side of the table. ritde portions 16 may begin on a line e-c, and terminate en a line j", f, said lines entending obiiquely or diagonally toward the lower side and delivery end"of the table.

rlhe riiiies 12 may in this. case be tapered continuously-troni their rear ends to a point beyond the beginning of the detiected riilie portions 16, for example, terminating on a diagonal line indicated at g, g, so that the vta er 'extends farther aion in case ot the upper ritlies than in the, case. ot the lower ritiies. The rniie portion 16 may terminate at the discharge edge ci the table, the concentrates being delivered directly into a launder 18.

"While l vhave found. the constructions above described to be most edective in practice, my invention is not limited thereto,

but may be embodied in any form of table operating on the same principle, and embodying as an essential feature, the gradual decrease in height et' the riiiies in the cleaning zone, or a portion thereof.

What it claim is:

1. A reciprocating concentrating table having a plane surface, one side of said t'able being higher than the other, rimes upon said table comprising rear portions, parallel to .the line or reciprocation of said table, and

The i 2; A reciprocating concentrating table having a plane surface, one si `of said table being higher than the o er, iiies upon said table com rising rear portions parallel to the iine o reciprocation of said table, vand ritlle portions extending fromv said rear riiiie ortions and deflected obliquely toward t .e higher side of the table and at an angle to said line of said reciprocation, theinitial and final ends of said deflected portions being advanced beyond the corresponding points of the preceding ritf'le and said ritiles decreasing 1n heightl fromtheir rear ends forwardly, the decrease 1n height of said rimes extending beyond the .beginning lof said deiiected portions of the riles, and terminating intermediate' the ends of said dedected portions of the riilles.

3. A reciprocatin concentrating table havin a plane sur ace, one side of said table ing higher than the other, ritiles upon said table comprising rear portionsv parallel to the line of reeiprqoation of' said table, and riie portions extending from said rear. riile portions and deflected obliquely toward the higher -side of the table and at an angle to said line of said reciprocation, the initial and nal ends of said deflected portions being advanced beyond the corres ponding points of the preceding rie and said rifiles decreasing in height from their rear ends forwardly, the decrease in height of saidvrilies terminating intermediate the ends of said deflected portions of the ries,

and front portions beginning at the ends of Ysaid deflected riflle portions, said front rile portions being deflected toward the lower side of the table.

In testimony whereof, I have hereunto set my hand at Los Angeles, California this 3rd day of May, 1912.

WILLIAM A. BUTGHART.

In presence of 'ARTHUR P. KNIGHT, MARTHA M. LANGE.

Copies of this patent may` be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, D. C. I 

